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- เผยแพร่เมื่อ 6 ก.ย. 2024
- Episode 6. Experts talk Lithium: Ryan Hammond from Sealed Performance Batteries and David Bayliss, BMPRO Brand Ambassador, discuss technical aspects of lithium (LiFePO4) batteries for caravanning applications.
Can you parallel Lithium batteries? Invicta Lithium batteries supplied by BMPRO can be put in parallel. Just remember to use the same size, same brand, and same age batteries.
Additional maintenance of paralleled batteries was discussed.
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The bacground music is very distracting and just gets in the way of the information you are trying to convey.
I have two brand new 100 amp hr lithium batteries and I am using them connected in parallel. It seems that one of batteries might not be sharing the load equally with the other. When checking the Bluetooth app all the power is comming from Battery #1 and none from Battery #2. Is there something I need to do to make the bluetooth BMSs "see" each other?
Bms discharge rate was not mentioned, does bms discharge rate double when in parallel
Lithium batteries have natural discharge rates not dependent on whether they are set in parallel.
what is the technical reason for the maximum number of batteries that can be paralleld? I often see max 4 or max 6. what causes this?
And do you batteries have current limiting in should SOC unbalance across the bank
Hi Matthew, the design of the internal battery management system of Invicta battery limits the number of batteries set in parallel - please refer to invicta.mymedia.delivery/wp-content/uploads/2021/02/Invicta-Booklet-A6.pdf for more information.
I'm new to lifepo4 projects...
My motorhome has 1 pack of 105ah lifepo4 12v already with it its own MPPT controller.
I need to increase the capacity, but the battery pack the I just bought is 100ah.
Peolpe did not recommended me to add them in series since they are different capacities...
Which is the best approach to add this new pack into the system without manual package switching for charging
and discharging?
Both packs have its own BMS.
I was checking the Epever Duoracer dual battery... but it supports the second battery as standard truck batteries.
Do we have some MPPT charger that can automatically charge/discharge the two batteries? Or should I add a new controller for pack #2
and put some devices in circuit #2. Or can I have a single system with automatic management for charging/discharge?
Big Thank You!!!!!!!! great information
Hi. I have 2 sets of 100AH Lithium batteries connected in parallel, (4 batteries total). Each set is connected using 4' long, 1/0 guage battery/welding cable. Is this setup sufficient or do I need to upgrade the 1/0 guage cable due to the 4' seperation of each set.
The batteries in each set are connected using standard (8" long), 1 guage cable. I am unable to move the sets any closer to each other.
Thank you in advance.
Voltage drop calculations needs to be done to ensure you are using the right size cable over the distance
Hi. I have 2 sets of 100 AH lithium batteries connected in parallel (4 batteries total) Each set is connected using 4' long, 1/0 guage cables. Is this setup sufficient or do I need to upgrade the cable guage because of the distance between each set?
The batteries in each set are connected using 1' long, 1 guage cables.
Thank you in advance.
Hi, voltage drop calculations will need to be applied. Also, it would be worth speaking with the battery manufacturer to see what cable size they may recommend for their BMS of the battery.
Why can't you do more than 4 batteries? What if I need a 12 batteries how would those be wired together?
Hi, could u please clarify if the current/amps that i can draw is doubled when in parallel like with AGMs.
I don't see how it could be with separate bms in each battery to control max discharge.
I get you double the amp hours,my point is when using high watt inverters that may draw 200amps and the lithium batteries even tho in parallel have a max discharge rate of 100amps individually with bms to control this.
Thanks
Hi Andrew,
The rule of thumb with an AGM is that you only use 50%-60% of its capacity to get the cycle life out of it. However, with a Lithium LiFePO4 battery, it can be discharged down as low as 10%. This is where you get double the amps. The BMS of a Lithium LiFePO4 battery will determine how many amps can be pulled out at any given time. The Invicta range BMS is rated at 100amps continuous and the Zeal 200AH Lithium LiFeP04 is rated at 200amps continuous. Other brands on the market, the BMS is only rated at 50-80amps. The Invicta and Zeal batteries can also be paralleled up to 4 batteries.
Regards
Stew / BMPRO Customer Service
@@BMPROau Thanks,a pollies response though.
Two invicta lithium in parallel has a constant amp draw of 100 amps not 200,so even four in parallel the constant amp draw is 100amp,not 400 amps, something i think is important if thinking of using large inverters.
Hi Andrew,
For Invicta batteries, with each battery in parallel, the BMS rating increases by 80% each time. So if a single battery draws 100 amps, two batteries would draw 180 amps. Just ensure when placing three or four batteries in parallel, a common positive and negative busbar should be used for the batteries to connect to running the same size and length in cables. The load will then draw off this busbar and spread the load over the batteries.
Regards,
Stewart / BMPRO Customer Service
Great info, but the music is too loud and is competing with the voices. Why was music included anyway? It doesn't add anything. It only distracts. In an informational video such as this, music should be limited to an intro, if used at all. Otherwise, great video!
Hello, why does the seller of my lithium iron phosphate battery say not to use in parallel is it because the BMS wont allow it?
rubbish
I have 2, 50 amp batteries I'd like to wire in parallel. What gage wire should I use to connect these batteries.
Hi, When connected to a BMPro battery management system, the cable should be rated at no less than 50 amps.
Did I damage my battery if I accidentally checked the voltage when it was plugged into DC10A? I forgot to switch it back to com
Could you please specify what do you mean by the DC10A?
@@BMPROau I checked the voltage and forgot to switch the testing probe back to com. my lithium battery has an internal bms in it but I'm wondering if there was still any damage to the battery? my multimeter is still working fine
This happened and the probe got hot↓
Warning: Make sure that if you’re measuring anything with a current higher than 200mA, you plug the red probe into the 10A port, rather than the 200mA port. Otherwise you could blow the fuse that’s inside of the multimeter. Furthermore, measuring anything over 10 amps could blow a fuse or destroy the multimeter as well.
If the battery was an Invicta or Zeal it would have shut down with an overcurrent short if the short was on there long enough. They may have damaged the leads on the multimeter or the multimeter itself. Stewart / BMPRO Customer Service
I have been using the battery lithium (100 AH 24v) for 6 months, can i put another battery lithium (100AH 24v) in parallel? is there any problem with this different age?
Thanks in advance
talk to the battery manufacture. the rule of thumb is to use the same age battery, or close to it (usually no more than 3 months) so the wear/aging of the battery is the same. if you have been fully cycling the battery every day, multiple times a day, the wear on that battery will be greater than a new one. All that being said, the worst case should be a lower lifetime of the new battery and perhaps of the original as well as it will always be working harder (its aged more) than the newer one. lifepo4, depending on manufacture can have warranties from 7-15yrs, so 6 months of use, if it wasn't cycled too much shouldn't be too bad. reiterating to check with the manufacturer to be sure though.
Very helpful! I have several 45v 50ah lithium ion batteries (2013 yusaka LIM50EN-12A0-D1)and would like to put two or three in parallel to a mppt charger (to my PVs of course) and to the inverter. l believe I need an external BMS to keep it safe and reliable. Can you confirm and recommend one?
Hi Ron, You would be best to speak with GS Yuasa Lithium Power, Inc about their batteries and the best way of configuration
What happens if I charge up three different manufactured LifeP04 Batteries together hooked in Parallel? What is the worst case scenario? Can I cause damage to any one of the individual BMS's?
if they have the same specs, same age, then just put individual fuses on them and you should be fine
Hi is placing lithium batteries in parallel allowed for any brand of lithium battery. I just purchased 2 100AMP RAPID X BATTERIES and they tell me i cannot parallel them why would they say that.
Hi Paul, the design of the internal battery management system limits the number of batteries set in parallel.
Thanks for that video. Is distance between the two batteries an issue? I’m thinking about one metre?
Yes, distance can be an issue. It is important to use voltage drop formulas to ensure that the correct size cabling is being used.
I have 3 units of 48v 150ah lithium Ion batteries, can I connect in parallel to give 48v 450ah?
Hi Oyebi, When connecting batteries in parallel, the voltage of the bank doesn’t change, the capacity does.
3 x 48v @ 150ah = 48v @450ah
When in series, voltage increases, capacity stays the same
3 x 48v @ 150ah = 144v @ 150ah
Interviewer talks 90% of the time. Guest expert barely had a chance to say "yes" or "no"
Can we connect 2 AGM batteries of different capacity in parallel (12V-180AH and 12V 220AH same brand)?
Peut-on brancher 2 batteries AGM de capacité différente en parallèle (12V-180AH et 12V 220AH même marque) ?
Hi Jean, It is not recommended to have dissimilar capacity batteries.
The discharge amperage versus voltage will vary between the 2 batteries, in the long term, this may cause one of the batteries to fail prematurely.
The batteries should be the same age, capacity, brand, and chemistry.
Hi can I connect 2 2200mah 1c batteries and discharge them at 4amps?
Sorry can't help - this video talks about caravan house batteries.
So can you safely parallel the input charging cables
With the Invicta batteries, they can be safely paralleled if the Invicta paralleling procedure is followed.
For the charge leads, the positive to battery 1 and the negative to battery 2 and linking cables between the batteries
Regards,
Stew
BMPRO Customer Service
bought a 48v 1000w brushless motor with a 30ah controller...some1 please help me with choosing the correct batteries?
Hi, it would be desirable to get some more information on the device in order to be confident in the recommendation, however based on the limited info given 1000W @ 48V = 20A, so max draw from the device is approx. 20A.
Based on this, it depends on how long you want to run it for, but suggestions from SPB Batteries would be for using 4 x SNL12V40S lithium batteries in series.
@@BMPROau Thanx 4 replying...I saw some 26650 lifepo4 5000mah batteries and was wondering if they would work as far as trying to put together a 48v batteru pack?
@@shamokinsweetie21083 It does depend on the brand of the battery; not all lithium batteries can be placed in parallel. Please check the range of the batteries available at www.sealedperformance.com.au/ and contact their customer service team for further assistance.
031121/1533h PST Greetings and thank you immensely for substantiating Paralleling 2 LiFePo4 batteries powering systems.
you are welcome, Sree!
You showed nothing on how to do it.
Why is it always said that you should only use lithium batteries of the same type? That contradicts yet completely a functioning BMS.
The BMS of lithium LiFePO4 batteries all vary from brand to brand. The role of the BMS is to balance out the cells of the battery, stop over-current protection, surge protection, low voltage disconnect. BMS charge voltages can be different in different brands. With different charge voltages, this can cause a Lithium LiFePO4 battery to go into over-current protection and shut down. The max load output can be different for brand to brand from anything from 40amp to over 200amp.
@@BMPROau I was thinking that different manufacturers are unsure of what will happen if different manufactured batteries are placed in a parallel configuration. For instance, if you were to place #2 Life Blue Batteries, in parallel with #2 CHINS Batteries, in parallel with #2 Amperetime Batteries. With all having the same charging parameters, what is the worst case scenario? if you were to place all #6 batteries in Parallel with one another, then charged together?
The expert guess didn't get to speak much